Best water heater for radiant floor heat in 2022 – BestHeaterGuide

Radiant floor heating has been around for many centuries but at that time they weren’t as convenient or economical as they are now. Such that more and more people are investing in radiant floor heating instead of a centralized heating system. Furthermore, with radiant floor heating, you can get even heating that is also gentle, unlike centralized heaters that propel the heat into the surroundings forcefully. Such that it is warmer near the outlet and colder as one goes further from it.

Radiant floor heating uses heated water which runs through PEX pipes to transfer heat from under the floor to your home. This works on the fact that heat rises upward while the cold settles down. So, heat escapes from the pex pipes to the floor which is made of a material like cement that allows the transfer of heat. From where it raises and heats the room from the bottom to the top.

This is good and all but it is still not cheap, especially buying a boiler that will heat the water circulating through the pipes. Typically a boiler compromises 25-50% ($2000-$6000) of the total cost of installing a radiant floor heating system. Whereas using a tankless water heater instead is many times cheaper in terms of both upfront cost as well as operational costs.

So, let us go over the best tankless water heaters for radiant floor heat that can work with radiant floor heating systems and can give you an inexpensive and worry-free solution against the cold.

Quick Shopping Tips for Best water heater for radiant floor heat

Budget Pick

Ecosmart Eco 18 is our budget pick for tankless water heaters for radiant floor heating. It has enough power to heat a 1000-square-foot space with ease. It is an affordable option both in terms of upfront cost as well as in operational cost thanks to its self-modulation technology.

Best Pick

The Takagi T-H3-DV-NG is ideal for radiant floor heating. It got a lot of tons of advanced features like troubleshooting error codes, self-modulation, and multiple protection mechanisms. It also got 10 GPM of hot water output capacity with the highest warranty period.

Staffs pick

Takagi TKJr2 is a great choice for being both a budget-friendly as well as a powerful and advanced tankless water heater. It is a diminished version of our best pick by the same manufacturer. It has also got a ton of convenient like error codes, digital display for easier temperature control, and protection mechanism for longer life.

At a Glance:

Our recomendations for Top Best water heater for radiant floor heat

Tankless water heaters are very popular and have gone through much advancement in recent decades which is not the case with boilers. Most of the boilers cannot compete with even the older versions of tankless water heaters in any scenario other than being more powerful. On the other hand, tankless water heaters are getting more and more energy-efficient, inexpensive, and incorporated with highly advanced features that you cannot find within a boiler.

AwardDesignTankless heater reviewsRetailer
Best budget water heater for radiant floor heat
Budget Pick1. Ecosmart ECO 18 Tankless Water Heater
Check Price
Best rated water heater for radiant floor heat
2. Stiebel Eltron Tempra 29 Tankless Water Heater
Check Price
Best natural gas water heater for radiant floor heat
3. Rinnai RUR199in Tankless Water Heater
Check Price
Best condensing water heater for radiant floor heat
Best Pick4. Takagi T-H3DVNG Tankless Water Heater
Check Price
Best indoor water heater for radiant floor heat
Staff Pick5. Takagi T-KJr2-IN-NG Tankless Water Heater
Check Price
Best electric water heater for radiant floor heat
6.  Rheem RTEX-18 18KW Tankless Water Heater
Check Price
Best instant hot water heater for radiant floor heat
7. Siogreen SIO 18 Tankless Water Heater
Check Price

1. Ecosmart ECO 18 Tankless Water Heater

Budget Pick

Best budget water heater for radiant floor heat

Ecosmart ECO 18 Electric Tankless Water Heater
Ecosmart ECO 18 Electric Tankless Water Heater

Ecosmart ECO 18 is a great option a for radiant floor heating system. However, we recommend that you use it in a closed-loop system with the radiant floor heating system instead of also using it for your household hot water demand as it is not powerful enough to facilitate both. A single Ecosmart Eco 18 can easily facilitate the radiant floor heat needs for a 1000sqft if it is well insulated so that heat loss is not too much.  Even though it offers a flow rate of 4.4 GPM, when the incoming water is at 40°F it may fall to 2 GPM.  But you don’t have to worry as with a closed-loop system no new water is needed and all Eco 18 has to do is to heat the water that loops back to it thanks to a recirculation pump which is then heated.

Features:

Self-modulation

Because of this function, the tankless water heater does not have to be on all of the time. The smart feature will make it operational only when needed and in the least capacity as required.

 Cooper heat exchangers

It is fitted with copper heat exchangers that make the heating process faster thanks to its higher heat transferability.

Aesthetic design

It has an appealing design which is by no means an eye sour. You can install it in visible places without being afraid of it being mismatched with your house.

 Warranty

Keeping its promise, Ecosmart offers a lifetime warranty on this unit.

Certified

It is certified by both UL and CSA

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Start with as little flow as 0.3 GPM
  • Suitable water pressure range is 25-150 Psi
  • Water hookups support ¾ in. NPT
  • Operation require 240v
  • Power output is 18KW
  • Needs to be installed with two 40A DP breakers
  • Followed with two 8 AWG wires for connecting them

Specifications

  • Color: White
  • Weight: ‎14 pounds
  • Dimensions: 3.63 x 14 x 17 inches

Pros

  • Durable unit
  • Affordable
  • Advance features like self-modulation
  • Inexpensive

Cons

  • It will take you sometime to find the right combination of settings for your desired effect

Why you should buy this?

If budget is the most major concern for you than look no further. This tankless water heater is the best combination of affordability, performance and warranty. This will no doubt make you satisfied with your selection.


2. Stiebel Eltron Tempra 29 Tankless Water Heater

Best rated water heater for radiant floor heat

Stiebel Eltron Tankless Water Heater
Stiebel Eltron Tankless Water Heater

If having a cleaner environment and efficient lifestyle is your priority then Stiebel Eltron Tempra 29 is perfect for you. It is probably the only tankless water heater that gives consistent hot water at the same temperature thanks to its advanced flow control patent technology.  Moreover, it is easier to operate and has a high flow rate of 6.7 GPM which is powerful enough to easily support the radiant floor heating for an area of 1500sqft. Furthermore, it is both reliable and user-friendly thanks to its durable construction and advanced features.

Features:

Advanced Flow Control

For Stiebel Eltron, it would not be wrong to say that its first priority is to provide you with consistent hot water with precise temperature. All thanks to its advanced flow control that controls the water flow to ensure evenly heated water.

Self-Modulation

Being a smart tankless water heater, it doesn’t have to operate at the maximum capacity but only operates at the same level as needed. This saves you tons of money on your bills.

Digital Temperature controls

Its easy-to-use digital temperature controls allow you to adjust its temperature setting thanks to its temperature dial while its digital display lets you know about the set desired temperature and the flow rate that the tankless water heater is providing to you at the moment.

Warranty

In case of any problems, it comes with a 3-year parts warranty and a 7-year leakage warranty.

Certified

ETL and UL are listed. It is certified by WQA and follows CSA requirements.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • The voltage requirement for this tankless unit is 240 volts.
  • Water connection hook ups arte compatible with 3/4 in. NPT
  • It is able to operate with water pressure of 30-150 psi.
  • Flow rate to kick start the unit is 0.77 GPM
  • The maximum output power is 28.8 kilowatts.
  • The current drawn is 120A.
  • Three 40A DP breakers are to be installed with this unit.
  • Three 8 AWG wires are used to connect 3 breakers and the unit’s heating elements.

Specifications

  • Color: White
  • Weight: ‎1 pounds
  • Dimensions: 4.63 x 16.63 x 14.5 inches

Pros

  • Self-modulation
  • Noiseless operation means that it can make you forget you had any device powering your radiant floor heating.
  • Longer lifespan thanks to its durable build.

Cons

  • This unit is designed for indoor use only.

Why you should buy this?

Stiebel Eltron Tempra 29 is perfect for those home owners who want to have even and consistent heating throughout your house. It is an environment friendly solution that is both inexpensive as well as noiseless making your life as comfortable as it can be.


3. Rinnai RUR199in Tankless Water Heater

Best natural gas water heater for radiant floor heat

Rinnai RU199iN RRU199iN, RU199in-Natural Gas/11 GPM
Rinnai RU199iN RRU199iN, RU199in-Natural Gas/11 GPM

Rinnai RUR199in is the premium choice in tankless water heaters for radiant floor heat. It has a complete set of advanced features that will make your experience like no else. It has recirculation capability which means that you won’t need to get a recirculation pump with it, which may or may not work with it. Moreover, it got wifi control, precise temperature control, and is highly efficient.

Feature:

Wifi Control

It is an extremely attractive feature when the tankless water heater is installed at one corner of the room with the rest of the radiant floor heating system. With this feature,, you can easily adjust the temperature setting without moving through the whole house to adjust it at the tankless water heater.

Low NOx

 It is a highly efficient tankless water heater that gives rise to only a limited amount of NOx. Such that it can meet the stringent requirement of SCAQMD and is safe for the environment but it still needs proper ventilation to remove the minute amount of NOx outside to keep your house environment safe.  

ThermaCirc360

It includes a built-in recirculation pump that uses a return line or thermal bypass valve to reheat cold water. It is a great addition as most recirculation pump doesn’t work perfectly with the tankless water heater except if it is built by the same manufacturer. With built-in recirculation capability, you don’t have to worry anymore.

Warranty

Rinnai RUR199IN brings Rinnai the highest warranty of 15-year for heat exchangers, 5-years for parts, and 1-year for labor.

Certified

CSA, AHRI, SCAQMD, and Energy Star Certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • 50-150 is the viable pressure range for optimal operation
  • It uses 120 volt for operation
  • Gas and water hookups attach with ¾ in. NPT
  • Activates with a flow of as little as 0.4 GPM
  • 3 in. and 5 in. concentric or 2 in. nominal pipe for venting
  • Operates on 15000-199000 BTUs

Specifications

  • Color: Gray
  • Weight:‎84 pounds
  • Dimensions: 22.05 x 14.76 x 33.86 inches

Pros

  • High output
  • Wifi control
  • Recirculation capability
  • Self-modulating

Cons

  • Although less expensive than a boiler it is still the one of the most expensive tankless water heater.

Why you should buy this?

It is the best tankless water heater that you can find but it is also very expensive which kind of losses that advantage of tankless water heaters being cheaper than boiler system. However, it is still give you the most luxury and savings in operation than its other counterparts.


4. Takagi T-H3DVNG Tankless Water Heater

Best Pick

Best condensing water heater for radiant floor heat

Takagi T-H3-DV-N Condensing Tankless Water Heater
Takagi T-H3-DV-N Condensing Tankless Water Heater

Takagi T-H3DVNG is the most popular and most commonly used tankless water heater for radiant floor heating purposes. It is a Japanese brand that explicitly points out that it can be used with a radiant floor heating system. It is a powerful tankless water heater with a flow rate of 10 GPM and 199,000 BTUs/h output. This means that it can power the radiant floor heat need of even large homes. Furthermore, it is also user-friendly in terms of identifying any problem the tankless unit may be facing thanks to its error diagnostic system.

Feature:

Error codes for system diagnosis

Being an advance and smart tankless water heater it can diagnose that issue it may be facing and lets you know in the form of error codes shown on the digital display. You can easier refer the error code to the user manual to identify the problem and take respective action.

Freezing, Surge and Overheating protection

T-h3-DV-NG is a robust unit that can face all kinds of circumstances thanks to its various protection mechanisms. Surge protection protects the unit from an unusual spike in the current while freezing protection protects the unit from the freezing of water inside the unit, and overheating protection prevents the water to be heated till a scalding temperature and in turn damaging the unit.

Energy efficient

Takagi T-H3-DV-NG is a condensing tankless water heater and offers an energy efficiency of 95% which is the highest within the range of similar units. This means that you will get the highest savings as natural gas is the cheapest fuel to operate a tankless water heater. 

Warranty

With a 15-year heat exchanger guarantee and a 5-year warranty on all parts, the TAKAGI T-H3-DVNG gives you peace of mind.

Certified

Energy Star Certified, AHRI/CSA Certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • This unit has a very low activation flow rate of 0.40 GPM
  • Operating pressure ranging from 15 to 150 psi are supported.
  • Requires a 120V power supply
  • Both the gas and water connections must be 3/4 in. NPT.
  • Condensate Drain with 1/2 in. NPT
  • 3-4 in. Schedule 40 PVC venting is required.
  • For operation, 15000 BTU to 199,000 BTU are required.

Specifications

  • Color:White
  • Weight: ‎59 pounds
  • Dimensions: 11.25 x 17.75 x 24.88 inches

Pros

  • Energy efficiency of 95%
  • Multi-level protection
  • Durable construction
  • Superior warranty period
  • Most popular choice

Cons

  • Lack of Wifi feature for remote controlling

Why you should buy this?

It is the most used tankless water heater with a radiant floor heating system which goes to show about its quality. It is a powerful tankless water heater that is most user-friendly as it let you know about any problem it may have run into. Which means you can easily solve most of the problem it will face during its operations.


5. Takagi T-KJr2-IN-NG Tankless Water Heater

Staff Pick

Best indoor water heater for radiant floor heat

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater
Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

T-Kjr2 is another great product by Takagi. It works quite similarly to Takagi T-H3-DVNG such that it would not be wrong to say that it is a marginalized version of T-H3-DVNG. It has most of the T-H3-DVNG features but is quite downgraded like it has a flow rate of 6.6 GPM and energy efficiency is 83% but it is due to the fact that it cost around the half price of T-H3-DV-NG. It is, nevertheless, powerful enough to meet the radiant floor heating needs of a medium-sized home.

Feature:

Multiple protections

Takagi gives a lot of consideration to safety that’s why Takagi T-Kjr2 also comes with protection against frost, overheating, and surge which means don’t have to worry about running into any of the common issues faced by the tankless water heater owners.

Troubleshooting error codes

Their protection mechanisms aren’t the only thing to ensure its seamless operations. Its troubleshooting error codes are another great addition to protecting your unit and as they let you know if it runs into any problem before it becomes a large problem.

Smart digital temperature controls

It comes with a smart digital display that lets you adjust the temperature setting according to your desire. Furthermore, its smart technology also lets you know how much hot water flow the tankless water heater is providing at the moment.

Warranty

Heat exchangers have a 10-year warranty, whereas parts have a 5-year warranty.

Certification

UL and Energy Star Certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • 0.50 GPM is the activation flow rate for this unit.
  • Water pressure should be between 30-150 psi
  • .

  • Direct venting in stainless steel (4 inches)
  • This device utilizes minimum BTUs of 19500 and a maximum BTUs of 140,000 BTU.
  • The required voltage is 120V.
  • ¾ in. NPT is suitable for both water and gas hookups.

Specifications

  • Color: Silver
  • Weight: 1 pound
  • Dimensions: 6 x 3.7 x 9.2 inches

Pros

  • Protection from overheating, freezing, and surges
  • NOx levels are low.
  • Certified by Energy Star
  • Error codes assist in the diagnosis of problems.
  • Excellent warranty

Cons

  • Energy factor is low compared to other tankless water heaters in our list

Why you should buy this?

If you are short on budget but don’t want to compromise on quality than TAKAGI KJr2 is the most suitable tankless water heater for you. Based on features and quality it is a smaller version of our best tankless water heater for radiant floor heating.


6. Rheem RTEX-18 18KW Tankless Water Heater

Best electric water heater for radiant floor heat

Rheem RTEX-18 Electric Tankless Water Heater
Rheem RTEX-18 Electric Tankless Water Heater

We all desire a home that is both comfortable and peaceful. You can accomplish just that with the Rheem RTEX-18. This electric tankless water heater is durable and eco-friendly and has not only got user-friendly controls but self-modulation and noiseless operations also. It fits well into a radiant floor heating system and gives comfortable warmth to your home. It is a mid-sized electric tankless water heater that can give radiant floor heating for an area of 1000sqft. By using it with a Radiant floor heating system, you will find that it is both use-effective as well as cost-effective.

Features:

Self-Modulation

Rheem RTEX-18 comes with self-modulation which gives you the highest savings thanks to its smart operation that works on the basis of “operate as needed”. This means minimum resources are used to match your hot water demands

Noiseless

The Rheem RTEX-18 electric water heater has a sleek, modern look and it is designed to operate quietly. So, you can experience peace and quiet while experiencing even warmth throughout the house.

Digital Temperature Control

It is no doubt a great feature in terms of getting the best user experience. With the digital temperature control, it is easy to see what the temperature is adjusted to as well as changing it is as easy as rotating a dial. Furthermore, the temperature change is possible in a 1-degree increment that allows you to find your most desired temperature settings.

Easy to Install

This tankless water heater is easy to install thanks to its simple installations while replacement parts can also be easily found in case of needing replacement.

Warranty

It comes with a 5-year warranty on the heat exchanger and 1–a year warranty on parts

Certified

UL, WQA,, and CSA certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Amp demand is 75A
  • Heating power is 18KW
  • Two 40A breakers needs to be installed with this unit
  • Recommended wire size for this unit is 8 AWG
  • Operate on 240 Volts
  • 0.3 GPM is the activation flow rate for this unit.
  • Minimum and maximum operating pressure is 25-150 Psi
  • Water connections are to be done with ¾ in. NPT

Specifications

  • Color: Gray
  • Weight: ‎14.78 pounds
  • Dimensions: 18.5 x 14.5 x 3.5 inches

Pros

  • Energy efficient
  • Quiet
  • Self-modulation
  • Easier controls

Cons

  • Limited power makes it not suitable for heating a larger area.

Why you should buy this?

A great electric tankless water heater that is suitable for most small or mid-sized houses. It is both affordable as well as durable which means that it won’t be a one-time thing but will stay with you for a long time and will help you save your cost for a long duration.


7. Siogreen SIO 18 Tankless Water Heater

Best instant hot water heater for radiant floor heat

SioGreen SIO 18 Infrared Electric Tankless Water Heater
SioGreen SIO 18 Infrared Electric Tankless Water Heater

SioGreen SIO 18 Electric tankless water heater is an innovative product that has been designed to provide a clean, healthy, and energy-efficient solution for the radiant floor heat in homes and offices. This product is designed with superior materials that are easy to maintain and extremely durable. It has quartz heating elements that are corrosion resistant and heat water only when needed. This way it reduces energy consumption and saves money. It gives as much as 65% savings on water heating bills compared to the storage water heater. In addition, this unit comes with a full range of safety features, including thermal cut-off, Anti-Scald protection, and current leakage protection.

Features

Maintenance-free

Siogreen SIO 18 Electric tankless water heater is a tankless water heater that is maintenance-free thanks to its quartz heating elements that don’t allow the scale to deposit. While combined with its anti-scale design make it a maintenance-free tankless water heater.

Corrosion-resistant

The Siogreen SIO 18 is a high-end water heater that comes with a corrosion-resistant quartz component. Moreover, its metallic components don’t come in contact with the water and thus don’t corrode.

Safety

SIO 18 is fitted with overheating and anti-scald protection so you can be worry-free about your water overheating your living space.

Auto-modulation

Auto-modulation features enhance the energy efficiency of the SIO 18 and reduce your heating bill to the bare minimum.

Warranty

A 2-year warranty is offered.

Certified

Met (US), WRAS, and CE certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activating flow rate is 0.5 GPM
  • Water (inlet/outlet) hookups support ¾ in. NPT
  • Amp demand is 80A
  • Maximum power output is 18 kW
  • Voltage demand is 220VAC
  • Wire size is 8 AWG
  • Two breakers of 40A DP

Specifications

  • Color: Silver
  • Weight: ‎28.3 pounds
  • Dimensions: ‎25 x 17 x 9.75 inches

Pros

  • Hard water resistant
  • Self-Cleaning design
  • Self-modulation
  • 98% energy Efficient

Cons

  • Limited power only allows heating of a smaller area

Why you should buy this?

Hard water is the biggest enemy of a tankless water heater. However, it is not true with Siogreen SIO 18 tankless water heater thanks to its quartz heating elements and patented far infrared technology that prevent scale deposit and maintain highest efficiency for the longest duration without any kind of maintenance.



Buyer Guide for Best water heater for radiant floor heat

Power Source

If you looking for a tankless water heater, the first thing to do would be to decide on the power source for your desired tankless water heater. A tankless water heater is primarily powered by three main sources that are electricity, Natural Gas, and Liquid Propane. Each has its own benefits like electric tankless water heater are the most efficient units and are most eco-friendly as they don’t need to vent any kind of gases outdoor. This implies that you can install them in your home without difficulty. Not to mention they have the least upfront cost in tankless water heaters. While gas-powered (natural gas or propane) tankless water heaters have higher power but need a vent to disperse the harmful gases outside of your house that gets formed as a result of gas or propane combustion. Furthermore, gas tankless water heaters are expensive in upfront cost but are cheaper to operate.

Open-loop or Closed-Loop

Depending upon the power of your tankless water heater, you can install the tankless water heater in an open-loop or closed-loop system. Whereby an open-loop system means forming such a system where a single tankless water heater is facilitating both the needs of radiant floor heating as well as the hot water demand of your house. A smaller tankless water heater cannot be used to avail both these functions hence a more powerful tankless water heater is needed.

Most commonly it is recommended that you go with the closed-loop heating system in which a tankless water heater heats the water which goes through the pex pipes to offer radiant heat and come back to the unit using a recirculation pump. This is because in times that radiant floor heating is working that water remains stagnant water in pipes which when used for drinking or eating may cause diseases.

Energy Efficiency and Energy Savings

To most of us who are looking to use a tankless water heater for radiant floor heating, the primary factor is to reduce the cost associated with radiant floor heating, and what better way to do so than by using tankless water heater. Thanks to tankless units being 23-50% more energy-efficient than traditional ones. It is one of the things that you should look for in a tankless water heater as higher energy efficiency means higher savings on your bills.

Most tankless heaters are designed with an energy factor of 0.80 or higher which means that even a $1 used tankless water heater will give a pure output of 80 cents while the rest of it may be lost. Hence, the higher the energy factor, the lower will be the loss and you will get the most of your expenses. We suggest that you aim for a 0.98 energy factor or higher as a standard in electric tankless water heaters. While a gas tankless water heater with an energy factor of 0.83 is good its condensing variants can give an energy factor of 0.90 or higher.

Price

Electric tankless water heaters are inexpensive and generally tend to remain in the range of $200-$700 where the highest prices are seen in the winter seasons. On the other hand, most gas tankless water heaters lie in the price range of $500-$2000. However, in the case of a boiler, even the cheapest one costs a minimum of $2000.

One common thing to observe in the tankless water heaters is that the higher the price, the more powerful will the tankless unit will be however it doesn’t necessarily mean that the more priced unit will also be more advanced.

Warranty

Warranty is the lifeline of every household appliance as you don’t know when it will run into any problem. Especially in the case of heavy powered appliances like the tankless water heater. These appliances are mostly under a large burden which makes it common to run into problems. So having a higher warranty can make your investment safer.

However, don’t make a warranty on its face value but also consult its terms and conditions before you sign up for the appliance as you may do something unintentionally that may cause your appliance warranty to be void.

AwardDesignTankless heater reviewsRetailer
Best budget water heater for radiant floor heat
Budget Pick1. Ecosmart ECO 18 Tankless Water Heater
Check Price
Best rated water heater for radiant floor heat
2. Stiebel Eltron Tempra 29 Tankless Water Heater
Check Price
Best natural gas water heater for radiant floor heat
3. Rinnai RUR199in Tankless Water Heater
Check Price
Best condensing water heater for radiant floor heat
Best Pick4. Takagi T-H3DVNG Tankless Water Heater
Check Price
Best indoor water heater for radiant floor heat
Staff Pick5. Takagi T-KJr2-IN-NG Tankless Water Heater
Check Price
Best electric water heater for radiant floor heat
6.  Rheem RTEX-18 18KW Tankless Water Heater
Check Price
Best instant hot water heater for radiant floor heat
7. Siogreen SIO 18 Tankless Water Heater
Check Price

Recommendation

We would recommend you to buy a Rinnai RUR199in if controlling your radiant floor heating system through wifi is a deal maker for you. If that’s not the case we would recommend you to go with TAKAGI T-H3-DV-NG for radiant floor heat in most mid-sized and large homes.


Conclusion

Tankless water heaters are a great addition to your radiant floor heating system as they are inexpensive and affordable both in terms of upfront costs as well as operating costs. But not all tankless water heaters work with a radiant heating system. We have presented you with the best and most commonly used tankless water heaters with a radiant floor heating system.


Frequently Asked Questions

Can you run radiant heat with a tankless water heater?

A tankless water heater does work well with the radiant heat system and doing so does come with a lot of benefits like lower energy expenditure, higher savings, and more uniform heating. However, some states do restrict you from the use of water heaters for space heating purposes, like Chicago, New York City, and LA. Doing so can go against the regulation and you may be fined. So, be sure to check first whether your state’s law allows it or not.

Will a tankless water heater work for floor heat?

There is no doubt about it as a lot of people are using them and these numbers are increasing without losing any kind of momentum. The reason is that they are energy-efficient, compact, and affordable. But the thing that makes the difference is that they allow even heating as most tankless water heaters come with digital temperature control heat which allows you to have a consistent temperature that allows even heating.

Can I use a tankless water heater for hydronic heating?

Hydronic heating systems can be used with electric tankless water heaters. They are both energy efficient and eco-friendly that’ why they are also one of the primary choices of the house owners. They are also energy-efficient even if they continue to work all the time this is due to the fact that they have self-modulation technology. This allows them to operate at different power levels. Hence, they save energy even while operating.

Can you use a hot water heater for infloor heat?

Yes, you can. A hot water heater can be used to heat the floors of your house. Most people buy a tankless water heater to be used with an infloor heat system due to its lower cost than a boiler. However, just because it’s less expensive doesn’t imply it won’t work well with the infloor system.


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Emma Johnson
By Emma Johnson

Hi, This is Emma. Author at “BestHeaterGuide.com”. I am a graduate of Mechanical Engineering. Currently researching on heating technology. However, I have learned many home heating techniques and still learning home heating technology. And I love to share my research and reviews.

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Best Tankless Water Heater Flush Kit in 2022 – BestHeaterGuide

The tankless water heater comes to a lot of conveniences but similarly, they are...

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Best outdoor natural gas tankless water heater in 2022 – BestHeaterGuide Tankless heater reviews

Best outdoor natural gas tankless water heater in 2022 – BestHeaterGuide

Tankless water heaters are gaining popularity by the day. People are looking for a...

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It's that time of year again when the cold weather sets in and we...

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Propane wall heaters are a great supplemental heating source for spaces that are already...

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